Harvey Weiss

Discusses various aspects of maps including direction, distance, symbols, latitude, and longitude, how maps are made, special purpose maps, and charts.

An introduction to six simple machines--the lever, the inclined plane, the screw, the wheel and axle, the wedge, and the pulley--and their use in more complex machines such as derricks, bulldozers, and metal lathes.

Introduces the tools, materials, and techniques for creating a variety of model trucks.